MSRA-2607

A 30-year-old woman who has just discovered that she is pregnant visits you for her initial appointment. She is currently 8 weeks pregnant and has no medical history. She reports feeling well so far. During the examination, her blood pressure is found to be 165/100 mmHg. You repeat the measurement twice and observe her blood pressure to be 170/110 and then 160/95 mmHg. You inform her that medication may be necessary to lower her blood pressure. What is the first-line medication for hypertension during pregnancy?